Tunebelt Armband Extender.
For those with larger size arms or to provide more room to wear the armband over a jacket, this Armband Extender increases the maximum arm size noted for the particular armband by about 6.5 inches.
For Tunebelt armbands.

Accessory specially designed to hold your phone while charging. Simply introduce the charger through the frontal gap before plugging to the wall. Twist the cable around it and place your smartphone on the horizontal base.